Rolling-mill.



No. 742,645. PATENTED OUT. 27,, 1903. Q

HEER. ROLLING MILL.

APPLICATION FILED OUT. 10, 1900.

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ATIORAIEV No. 742,645. PATENTED OCT. 27, 1903.

0. HEER. ROLLING MILL.

APPLICATION FILED 00110, 1900. N0 MODEL. 4 SHEETS-SHEET 2.

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0. HEER. ROLLING MILL.

APPLICATION FILED OUT. 10, 1900.

PATENTED OCT. 27, 1903.

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No. 742,645. PATENTED OCT. 27, 1903.

0. HEER. ROLLING MILL.

APPLICATION FILED OCT. 10, 1900.

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PATENT FFICE.

OTTO HEER, or DUSSELDORF, GERMANY. 7

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 742,645, dated October 27, 1903. Application filed October 10, I900. Serial No. 32,624. (No model.)

To all whom it may concern:

Be it known that I, OTTO HEER, a citizen of the Republic of Switzerland, and a resident of Dusseldorf, in the. Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Rolling- Mills, of which the following is a specification.

The invention consists in the'features, combinations, and arrangement of parts hereinafter described, and particularly pointed out in the claims. I

In the accompanying drawings, Figure 1 isa section on the line A B of Fig. 3. Fig. 2 is a side view of part of the roll-standard with the rolls carried thereby. Fig. 3 is a plan view of the right-hand portion of the rollermill. Fig. 3 is a view of the left-hand half of the apparatus which joins the parts shown in Fig. 3. Figs. 4 and 5 are front and end views of the frame with carriage and attached parts. Figs. 6 and 7 are respectively a crosssection and an elevation of the rolls. Fig. 8 shows the method of'suspending the rolls. Figs. 9 to 11 show the various positions of the rolls and roll-standard. Fig. 12 is a sectional elevation of the entire mill.

The suspension of the roll-standard a is preferably effected by attaching it to a guidegirder b, which bears at the top a head-piece o. By means of the said piece the whole is suspended on a securely-supported horizontal shaft 61, round which it can oscillate, as shown in Fig. 8.

v In frame a, Figsl, 2, and 3, are mounted two rolls e, placed one over the other, the grooves of which are inclined to the axis. The rolls are driven by two gear-wheels f, meshing with each other and fixed to the roll-shafts by means of any suitable motor actuating one of the rolls. However, this action must be so regulated that the rolls are alternately revolved to the left and right.

The extent of revolution of the rolls in either direction is trifling and generally only so great that about half the circumference of the rolls revolves on the work. The diameter of the grooves is constant for the greater part of its length. It widens only at the front end and terminates in a cut-awayportion.

The necessary displacement of the rolls in the axial direction is effected by means of the spiral groove 72., arranged in the journal of the bearings of each roll, the said groove moving over a ball half embedded in the interior wall of the corresponding bearing. By this. means the center line of the shapinggroove will be held during the rolling process constantly in line with the axis of the spindle. Thehollow body 11 to be rolled is placed on a mandrel K, which is detachably fastened to a carriage m, adapted to move in the frame l,'as shown in Fig. 3; The roll-standard is forced toward the work "L on the mandrel K by means of the air-buffersn, the piston-rods of which are connected to the roll-standard a, so that the rolls 6 in their resting position, with the wide'foremost part of their grooves adjacent to one another, embrace the work near its free end. If the rolls are then r'otated by means of the motor in the direction indicated by the arrows in Fig. 9, the shoulders of the narrower parts of the grooves where they commence near the wide ends are forced together near the end of the work, which is held fast during this process, and in rolling bring the said end to the normal crosssection of the grooves so far as said end extends. In consequence of the expansion of the work toward the free end of the mandrel K the rolls move farther in the same direction, at each successive pass overcoming the counter-pressure of the air-buffers at each pass until the direction in which the rolls revolve changes, when the said rolls are rolled back under theinfluence of the air-buffers n until the wide part of the grooves is again pushed over the body of the work, which at this moment is forced farther forward. The shoulders then take a grip of the work farther on the previously-unrolled body of the work, and operation then continues, with the rolls revolving in the previous direction.

These passes are repeatediuntil the workhas been rolled out tothe dimensions required. As the construction and operation of airbulfers, such as n, are well known, they are shown in a general way only in Fig. 3. The work is forced forward on each oscillating movement of the roll-standard by means of the movement of the latter. In the present form of construction the forward movement of the work is effected by means of a ratchet device (see Figs. 3, 4, and 5) which is operand shaping of ated by a rodp, connected at one end with the lever carrying the ratchet and at the other end with the Oscillating roll-standard, a spiral spring being inserted for preventing shock to the rod on the standard a striking against the frame Z. During the return oscillating movement of the rolling-mill the rod 1) is moved forward, while the turning of the ratchet-wheel 0 and the toothed wheel 1, mounted with the latter on the same shafto is effected. Since the said ratchet-wheel '1" gears with a rack g", which is connected with the carriage m, arranged in the fixed frame Z, the carriage must be moved forward at each oscillating movement of the standard, the front part of the said carriage carrying the mandrel K for receiving the hollow work in such a manner that it is either rigid or it' can be swung or displaced axially to a small extent. Simultaneously with the commencement of the forward movement of the carriage the mandrel K and the work placed thereon make an eighth or quarter revolution by means of the toothed wheel 25, arranged on the carriage m and gearing in the fixed rack s, and the bevel-gearing u and o for the purpose of displacing any inequalities formed on both sides of the work when the grooves do not close completely and bringing same under the influence of the rolls during their return movement toward the frame Z. In order to weaken the shock of the roll-standard 0 against the frame Z, spiral springs y-areprovided at the point of contact.

YVhat I claim, and desire to protect by Letters Patent, is

l. Arolling tubes and other hollow bodies comprising a roller-frame a, shouldered rollers therein capable of gripping the work in one movement and releasing the same upon the other movement during their oscillation, a pendulum-like part c carrying the rollerframe at its lower end, an elevated shaft 61 upon which the pendulum-like part c oscillates, means forsupporting the elevated shaft, a horizontal spindle adapted to carry the piece to be worked and means for moving forward the said spindle and for giving it a rotary movement when the roller-frame on its return oscillation moves toward the said spindle, substantially as described.

2. In combination, a frame carrying rollers which are shouldered, a spindle for supporting the work directed between the said rollers, the axes of the rollers and spindle being at an oblique angle to each other, said rollers havingspiralshapinggrooves therein, and means forgiving the rollers an automatic axial move ment so that the center line of the shapinggroove will be held during the rolling process constantly in line with the longitudinal axis of the spindle, substantially as described.

3. In combination, a frame carrying rollers which are shouldered, a spindle for supportplant for the gradual rolling in g the work directed between the said rollers, the axes of the rollers and spindle being at an oblique angle to each other, said rollers having spiral shapinggrooves therein, and means for giving the rollers an automatic axial movement so that the center line of the shapinggroove will be held during the rolling process constantly in line with the longitudinal axis of the spindle, said means consisting ofa semicircular groove h in the journal of the rollers and means carried by the bearing for engaging the said groove, substantially as described.

4. In combination with a movable frame carrying rollers which are shouldered, 'a spindle It for supporting the work-piece, a frame, a carriage m movable in said frame and means with connections to the roller-frame for automatically moving the carriage by the movement of the roller-frame, substantially as described.

5. In combination with a movable frame carrying rollers which are shouldered, a spindle k for supporting the work-piece, a frame, a carriage m movable in said frame, means for automatically moving the carriage,said means consisting of a rod p arranged to be operated by the roller-frame, a lever to, a rack-bar connected with the carriage, a gear-wheel meshing with the rack-bar and pawl-and-ratchet mechanism between the gear-wheel and the lever, substantially as described.

6. In combination with the rollerframe, a spindle for holding the work, a carriage supporting said spindle, means for moving the carriage comprising pawl-and-ratchet mechanism and means for rotating the spindle'consisting of the bevel gear-wheels a, o, the gear t connected to one of said bevel-gears and a rack-bar s fixed to the frame and arranged to operate the gear-wheel 25, substantially as described.

7. In combination, a spindle for holding the work, rollers for operating upon the work, an oscillating frame carrying the rollers, and airbuffers n connected with the oscillating frame arranged to assist the movement of said frame toward the spindle and to act in opposition to the-movement of the frame away from the said spindle, substantially as described.

8. In combination, a pair of rolls, a movable frame carrying the same, means for feeding the work between the rolls, means for imparting to the rolls a rotary movement, said rolls moving along the work in one direction by their frictional contact with said work and means for forcing the movable frame with the rolls in the opposite direction, when the direction of rotary movement of the rolls changes, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

OTTO HEER.

Witnesses:

WILLIAM ESsENWEIN, OSKAR Kt'INzELL. 

